SSD and data retention - Samsung 840 Pro

I have Samsung 840 Pro 256GB drive. In spec of this drive is following info: 5 years limited (client PC use only, 1 year data retention)* 5 years limited warranty assumes a workload of 40GB/day (host writes, 3-month data retention) for enterprise applications. Workloads in excess of 40GB/day are not covered under warranty.

My question is:

What is data retention? Is this meaning the drive will lost all data on it if I won`t power up the drive through the 1 year (for example, I remove the drive from PC for a long time)? I don`t understand this parameter. What is diffrence betweenclient PC use only, 1 year data retention andhost writes, 3-month data retention? Only 3 months without power in write intensive environment and all data on SSD will be destroyed?? I use this drive at home mainly for read operations - must I worry about my data?

NAND endurance refers to how many write cycles the NAND can accept before data can no longer be written to the drive.

99.99% or more of consumers who buy an SSD will never wear it out. And generally speaking, SSDs are a poor choice for storing data on long term, removed from a host system. HDD or tape even, would be better.